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Cam bolt thread size?
Posted: March 15th, 2011, 12:56 pm
by SilverXJ
Anyone know what thread the cam bolt is?
Re: Cam bolt thread size?
Posted: March 15th, 2011, 6:37 pm
by IH 392
1/2"DIA-20TPI x 1 3/8"L, the one in my 258 is anyway.
Re: Cam bolt thread size?
Posted: March 15th, 2011, 8:00 pm
by 5-90
IH 392 wrote:1/2"DIA-20TPI x 1 3/8"L, the one in my 258 is anyway.
The cam screw is 1/2"-20? On my 6-242, it looks more like about a 3/8"-16.
Interesting, I didn't think it would be that big. Sounds almost oversize.
On that note, do you have a listing of screw sizes? I've been trying to accumulate them to fill out a chart I've got on my site.
Re: Cam bolt thread size?
Posted: March 15th, 2011, 8:36 pm
by IH 392
5-90 wrote:The cam screw On my 6-242, looks more like about a 3/8"-16.
The screw in my '00 4.0 thrust plate engine measures 7/16"-14TPI 1 1/8"L.

Re: Cam bolt thread size?
Posted: March 16th, 2011, 6:52 am
by SilverXJ
I thought it was 1/2-20 but I just wanted to verify. Thanx.
Re: Cam bolt thread size?
Posted: March 16th, 2011, 11:55 pm
by 5-90
IH 392 wrote:5-90 wrote:The cam screw On my 6-242, looks more like about a 3/8"-16.
The screw in my '00 4.0 thrust plate engine measures 7/16"-14TPI 1 1/8"L.

That makes a little more sense - I couldn't see it being 1/2"-20, and it has been a while since I pulled one (and it would have been on a RENIX engine anyhow.)
Making it the same size as the crankshaft nose screw seemed to be too much, tho - no reason for it!
Re: Cam bolt thread size?
Posted: March 17th, 2011, 5:30 am
by unlimitedrubicon
The small bolts that hold the thrust plate are smaller ~7/16", but the bolt that goes into the nose of the older style and performance cams is ~1/2".
Re: Cam bolt thread size?
Posted: March 17th, 2011, 3:03 pm
by shawnxj
i should have an extra if you need it